Stock-Based Compensation and Warrants - Schedule of Stock-Based Compensation Expense (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Jun. 27, 2026	Jun. 28, 2025	Jun. 27, 2026	Jun. 28, 2025
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Total stock-based compensation expense	$ 48,411	$ 38,688	$ 142,902	$ 97,956
Income Statement Location [Axis]: us-gaap:CostOfRevenue \| Systems
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Total stock-based compensation expense	16,511	11,039	38,752	21,119
Income Statement Location [Axis]: us-gaap:CostOfRevenue \| Software maintenance and support
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Total stock-based compensation expense	336	143	1,088	397
Income Statement Location [Axis]: us-gaap:CostOfRevenue \| Operation services
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Total stock-based compensation expense	698	631	2,712	1,329
Income Statement Location [Axis]: us-gaap:ResearchAndDevelopmentExpense
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Total stock-based compensation expense	8,037	9,950	30,821	30,929
Income Statement Location [Axis]: us-gaap:SellingGeneralAndAdministrativeExpense
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Total stock-based compensation expense	22,829	16,925	69,529	44,182
RSUs (service-based and performance-based)
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Total stock-based compensation expense	47,145	37,716	139,470	95,102
Employee stock purchase plan
Share-Based Payment Arrangement, Expensed and Capitalized, Amount [Line Items]
Total stock-based compensation expense	$ 1,266	$ 972	$ 3,432	$ 2,854